Compilare: user.cpp: In function ‘int main()’: user.cpp:112:31: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(&t, sizeof(ll), 1, fin); ^ user.cpp:115:32: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(&n, sizeof(ll), 1, fin); ^ user.cpp:117:38: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(&arr[i], sizeof(ll), 1, fin); ^